Sponsored Content
Top Forums Shell Programming and Scripting awk :quick question removing empty line. Post 302805777 by rveri on Saturday 11th of May 2013 12:48:47 AM
Old 05-11-2013
MadeInGermany ,
Thanks this is also a nice code, seems inside [ ] the caret is doing negetion for #.
But couldn''t get how the empty lines are getting removed.

Code:
awk '/^[^#]/ {print}' file

Is that means print lines starting with something , but not hash and empty lines.

Thanks for the post.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

perl question - removing line from input file

In perl I want to do remove the top line of my input file then process the next line. I want to do something like head -1 inputfile > temp grep -v temp inputfile > newinputfile cp newinputfile inputfle is this possible in perl? (3 Replies)
Discussion started by: reggiej
3 Replies

2. Shell Programming and Scripting

Help with AWK -- quick question

Ok. I'm just starting to use AWK and I have a question. Here's what I'm trying to do: uname -n returns the following on my box: ftsdt-svsi20.si.sandbox.com I want to pipe this to an AWK statement and make it only print: svsi20 I tried: uname -n | awk '{ FS = "." ; print $1 }' ... (5 Replies)
Discussion started by: Probos
5 Replies

3. Shell Programming and Scripting

Sed question (Removing a line of text)

I am working with bash on HP-UX server at school. As practice for scripting, I am trying to make a pretend server admin script that adds a user to the system, deletes a user from the system, and lists all users of the pretend system. I have accomplished this with a select loop. Adding users, and... (2 Replies)
Discussion started by: masterscout1977
2 Replies

4. Shell Programming and Scripting

awk - if field is empty, move line to new file

I have a script with this statement: /usr/xpg4/bin/awk -F"" 'NR==FNR{s=$2;next}{printf "%s\"%s\"\n", $0, s}' LOOKUP.TXT finallistnew.txt >test.txt I want to include logic or an additional step that says if there is no data in field 3, move the whole line out of test.txt into an additional... (9 Replies)
Discussion started by: scriptr2be
9 Replies

5. Shell Programming and Scripting

awk print last line returns empty string

hello I have a file with lines of info separated with "|" I want to amend the second field of the last line, using AWK my problem is with geting awk to return the last line this is what I am using awk 'END{ print $0 }' myFile but I get an empty result I tried the... (13 Replies)
Discussion started by: TasosARISFC
13 Replies

6. Shell Programming and Scripting

awk script creates empty line

I have the following awk script to which I pass the file > 10 0 0 10 0 0 > 12.997 0 5.71132 12.9098 0.0687626 5.48855 12.7506 0.174324 5.13225 12.5913 0.262662 4.80643 12.4316 0.335652 4.50283 12.2717 0.394598 4.21542 12.1113 0.440399 3.93957 11.9506 0.473646 3.67148 11.7894... (2 Replies)
Discussion started by: kristinu
2 Replies

7. Shell Programming and Scripting

Quick sed/awk question

Hi fellow linux-ers, I have a quick question for you. I have the following text, which I would like to modify: 10 121E(121) 16 Jan 34S 132E 24 Feb 42 176E(176) 18 Sep 21S 164E 25 May 15 171W(-171) 09 Jul How can I do the following 2 modifications using sed and/or awk? 1. in 1st column,... (1 Reply)
Discussion started by: lucshi09
1 Replies

8. Shell Programming and Scripting

Quick awk question

gawk 'BEGIN{count=0} /^Jan 5 04:33/,0 && /fail/ && /09x83377/ { count++ } END { print count }' /var/log/syslog what is wrong with this code? i want to search the strings "fail" and "09x83377" from all entries. im grabbing all entries in the log starting from Jan 5 04:33 to the end of the... (3 Replies)
Discussion started by: SkySmart
3 Replies

9. UNIX for Dummies Questions & Answers

Using awk to remove duplicate line if field is empty

Hi all, I've got a file that has 12 fields. I've merged 2 files and there will be some duplicates in the following: FILE: 1. ABC, 12345, TEST1, BILLING, GV, 20/10/2012, C, 8, 100, AA, TT, 100 2. ABC, 12345, TEST1, BILLING, GV, 20/10/2012, C, 8, 100, AA, TT, (EMPTY) 3. CDC, 54321, TEST3,... (4 Replies)
Discussion started by: tugar
4 Replies

10. Shell Programming and Scripting

awk to identify empty fields in line

I am trying to use awk to identify and print out records in fields that are empty along with which line they are in. I hope the awk below is close, it runs but nothing results. Thank you :). awk awk -F'\t' 'FNR==NR ~ /^*$/ { print "NR is empty" }' file file 123 GOOD ID 45... (3 Replies)
Discussion started by: cmccabe
3 Replies
MboxParser::Mail::Body(3pm)				User Contributed Perl Documentation			       MboxParser::Mail::Body(3pm)

NAME
Mail::MboxParser::Mail::Body - rudimentary mail-body object SYNOPSIS
use Mail::MboxParser; [...] # $msg is a Mail::MboxParser::Mail my $body = $msg->body(0); # or preferably my $body = $msg->body($msg->find_body); for my $line ($body->signature) { print $line, " " } for my $url ($body->extract_urls(unique => 1)) { print $url->{url}, " "; print $url->{context}, " "; } DESCRIPTION
This class represents the body of an email-message. Since emails can have multiple MIME-parts and each of these parts has a body it is not always easy to say which part actually holds the text of the message (if there is any at all). Mail::MboxParser::Mail::find_body will help and suggest a part. METHODS
as_string ([strip_sig => 1]) Returns the textual representation of the body as one string. Decoding takes place when the mailbox has been opened using the decode => 'BODY' | 'ALL' option. If 'strip_sig' is set to a true value, the signature is stripped from the string. as_lines ([strip_sig => 1]) Sames as as_string() just that you get an array of lines with newlines attached to each line. NOTE: When the body is actually some encoded binary data (most commonly such a body is base64-encoded), you can still use this method. Then you wont really get proper lines. Instead you get chunks of binary data that you should concatenate as in my $binary = join "", $body->as_lines; If 'strip_sig' is set to a true value, the signature is stripped from the string. signature Returns the signature of a message as an array of lines. Trailing newlines are already removed. $body->error returns a string if no signature has been found. extract_urls extract_urls (unique => 1) Returns an array of hash-refs. Each hash-ref has two fields: 'url' and 'context' where context is the line in which the 'url' appeared. When calling it like $mail->extract_urls(unique => 1), duplicate URLs will be filtered out regardless of the 'context'. That's useful if you just want a list of all URLs that can be found in your mails. $body->error() will return a string if no URLs could be found within the body. quotes Returns a hash-ref of array-refs where the hash-keys are the several levels of quotation. Each array-element contains the paragraphs of this quotation-level as one string. Example: my $quotes = $msg->body($msg->find_body)->quotes; print $quotes->{1}->[0], " "; print $quotes->{0}->[0], " "; This should print the first paragraph of the mail-body that has been quoted once and below that the paragraph that supposedly is the reply to this paragraph. Perhaps thus: > I had been trying to work with the CGI module > but I didn't yet fully understand it. Ah, it is tricky. Have you read the CGI-FAQ that comes with the module? Mark that empty lines will not be ignored and are part of the lines contained in the array of $quotes->{0}. So below is a little code-snippet that should, in most cases, restore the first 5 paragraphs (containing quote-level 0 and 1) of an email: for (0 .. 4) { print $quotes->{0}->[$_]; print $quotes->{1}->[$_]; } Since quotes() considers an empty line between two quotes paragraphs as a paragraph in $quotes->{0}, the paragraphs with one quote and those with zero are balanced. That means: scalar @{$quotes->{0}} - DIFF == scalar @{$quotes->{1}} where DIFF is element of {-1, 0, 1}. Unfortunately, quotes() can up to now only deal with '>' as quotation-marks. VERSION
This is version 0.55. AUTHOR AND COPYRIGHT
Tassilo von Parseval <tassilo.von.parseval@rwth-aachen.de> Copyright (c) 2001-2005 Tassilo von Parseval. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
perl v5.12.3 2005-12-08 MboxParser::Mail::Body(3pm)
All times are GMT -4. The time now is 12:57 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy